Kick Your 12-3-30 Workout Up a Notch with These Variations
The 12-3-30 workout is a simple but effective way to get in a cardio workout. Whether you're a beginner or a seasoned athlete, there's a variation of the 12-3-30 workout that's right for you. Learn how to modify the incline, speed, and duration of the workout to get the results you want.